This season's prAna Revolution Mat is updated with a new layering technique that's significantly lighter while providing the same cushioning and stability it's known for. The largest prAna yoga mat is made from non-amazon-harvested tree rubber. Largest yoga mat available. New 3 layer design is now 2 lbs lighter. Made from biodegradable, non-Amazon harvested tree rubber that provides excellent grip in any pose. Firm cushioning for stability. Non-toxic. Open cell construction. 78 long (198cm) x 30 (76cm) x 4mm thick. 5.9 lbs (2.85 kg). 100% Rubber. Material: Rubber.